sampling scheme

例句：

1. 1. The company has developed a sampling scheme for testing new products.
   该公司已为测试新产品制定了一个抽样方案。
2. 2.The research team used a sampling scheme to gather data from different regions.
   研究团队使用了一个抽样方案来收集不同地区的数据。
3. 3.The sampling scheme was designed to ensure that all samples were representative of the population.
   该抽样方案旨在确保所有样本都能代表整个人群。